In the one into which Peter unsuspectingly sank the springs were broken, and he hit the backs of his knees against the wooden frame.
彼特不经意
坐下去，那椅子
弹簧一下就断了，他膝背竟打在椅子木
。
;;;,欢欣;;;;;
过去式和过去分词;;In the one into which Peter unsuspectingly sank the springs were broken, and he hit the backs of his knees against the wooden frame.
彼特不经意坐下去，那椅子弹簧一下就断了，他膝背竟打在椅子木。
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